Poa 



Festuceae 



105 



Miles 



30 



Map 148 



Poa autumnalis Muhl. 



Intermediate nerves of lemmas prominent. 

 Lemmas 2.5-3 mm long. 



Midnerve of lemmas pubescent only on the basal half; lemmas acute or 

 subacute ; plants with creeping rootstocks ; anthers purple, mostly 



1.4-1.5 mm long; 10. P. pratensis. 



Midner/e of lemmas pubescent the entire length; lemmas obtuse; 

 plants without creeping rootstocks; anthers purple, 1.6-1.8 mm 



long 11. P. sylvestris. 



Lemmas 4-4.5 mm long. 



Anthers 1-1.5 mm long; lemmas acute 12. P. Wolfii. 



Anthers 2-2.5 mm long; lemmas obtuse 13. P. cuspidata. 



1. Poa annua L. Annual Bluegrass. Map 146. This grass is found 

 throughout the state in almost all sorts of habitats except in very wet 

 places. It is most often found in lawns, gardens, orchards, and waste 

 places about dwellings. It is, however, found in logging roads in dense 

 woodland, in pastures, and along roadsides. 



Nat. of Eu. ; Newf . and Lab. to Alaska, southw. to Fla. and Calif. ; also 

 in tropical America at high altitudes. 



2. Poa Chapmaniana Scribn. Chapman Bluegrass. Map 147. This 

 species is restricted mostly to southern Indiana where it is usually found 

 in hard, white, slightly acid, clay soil in fallow fields where it is often abun- 

 dant and usually associated with Alopecurus carolinianus, Myosotis vir- 

 ginica, and Arabis virginica. Since all of my specimens are from fallow 

 and cultivated fields, it seems that one would be justified in assuming that 

 it is being introduced from the area to the south of us. In 1937 it was an 

 abundant weed in an Iris farm near Bluffton, Wells County. 



Del. to Iowa, southw. to Ga. and Tex. 



3. Poa autumnalis Muhl. Map 148. This species, as I know it, is a deep 

 woodland grass found in slightly acid soil in low beech and sweet gum, pin 

 oak, and red maple woods. All of our specimens are from southern Indiana, 

 although it is reported to occur in Michigan. 



N. J. to Mich, and 111., southw. to Fla. and Tex. 



